Experimental Determination of the Fluorescence Quantum Yield of Semiconductor Nanocrystals

Many studies have considered the luminescence of colloidal II-VI nanocrystals, both in solution at a collective scale and at an individual scale by confocal microscopy. The quantum yield is an important figure of merit for the optical quality of a fluorophore. We detail here a simple method to deter...

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Bibliographic Details
Published inMaterials Vol. 4; no. 7; pp. 1182 - 1193
Main Authors Laverdant, Julien, Marcillac, Willy Daney de, Barthou, Carlos, Chinh, Vu Duc, Schwob, Catherine, Coolen, Laurent, Benalloul, Paul, Nga, Pham Thu, Maître, Agnès
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 30.06.2011
MDPI
Subjects
colloidal nanocrystals
Condensed Matter
fluorescence
Nanocrystals
Physics
quantum yield
fluorescence
colloidal nanocrystals
quantum yield
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Summary:Many studies have considered the luminescence of colloidal II-VI nanocrystals, both in solution at a collective scale and at an individual scale by confocal microscopy. The quantum yield is an important figure of merit for the optical quality of a fluorophore. We detail here a simple method to determine the quantum yield of nanocrystals in solution as a function of the absorption. For this purpose, we choose rhodamine 101 as a reference dye to measure the nanocrystal fluorescence quantum yield. The influence of the concentration on quantum yield is therefore studied for both the reference and the solutions of nanocrystals and is found to be critical for the acuity of the method. Different types of nanocrystals are studied to illustrate different quantum yield evolutions with the concentration.
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ISSN:1996-1944
1996-1944
DOI:10.3390/ma4071182